Improved surface‐enhanced Raman scattering of polypyrrole electrodeposited on roughened substrates composed of Au–Ag bimetallic nanoparticles

Chuang, Thomas C.; Liu, Yu Chuan; Wang, Chee Chan

doi:10.1002/jrs.1363

Cited by 16 publications

(8 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Raman spectra of AgNO 3 , pure PPy, and PPy/Mt/Ag composites are depicted in Figure . The spectra of pure PPy is similar to that of the previous literature . The peak at 1555 cm −1 is related to CC bond‐stretching vibrations in PPy.…”

Section: Resultssupporting

confidence: 82%

Electroconductive and catalytic performance of polypyrrole/montmorillonite/silver composites synthesized through in situ oxidative polymerization

Tran

Park

Hussain

et al. 2017

J of Applied Polymer Sci

View full text Add to dashboard Cite

The present study demonstrates a simple approach to the formation of polypyrrole/montmorillonite/silver (PPy/Mt/Ag) composites via in situ oxidative polymerization of pyrrole (Py) in the presence of AgNO3 acting as a direct oxidant. The polymerization was performed in the presence of dodecylbenzenesulfonic acid, which acts as a stabilizing and doping agent. The morphological, structural, and thermal properties of PPy/Mt/Ag composites are discussed in detail and a possible formation mechanism is proposed. The electrical conductivities of the composites pressed at different pressing pressures were investigated using four‐probe analyzer. X‐ray diffraction, transmission electron microscopy, and scanning electron microscopy results indicated the partially exfoliated structure of the composites and Fourier transforms infrared results suggested the strong interactions between SiOSi groups in Mt and NH groups in PPy chains. The addition of Mt in the PPy polymer enhanced thermal property of the polymer. The conductivity of 1.08 S cm−1 was observed in the sample with 20 wt % Mt loading and applied pressure of 5 MPa. The composites obtained in the present study catalyze the reduction of methylene blue by sodium borohydride, achieving 92% conversion of MB to colorless within a few minutes. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45986.

show abstract

Section: Resultssupporting

confidence: 82%

Electroconductive and catalytic performance of polypyrrole/montmorillonite/silver composites synthesized through in situ oxidative polymerization

Tran

Park

Hussain

et al. 2017

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…With a total of 299 Adaptive silver films were used for SERS of biomolecules by Drachev et al 7 Chemically transformed carbon nanotube thin films 8 or roughened substrates composed of Au-Ag bimetallic nanoparticles 9 were employed by others to enhance the Raman scattering signal. The Editor-in-Chief of JRS feels that it may be valuable to provide the readers of this journal with a quick and effective way to be informed of the latest developments in the many different fields of Raman spectroscopy and to have a reliable overview of concurrent investigations in the various laboratories throughout the world where similar work is being performed.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in linear and nonlinear Raman spectroscopy I

Kiefer

2007

J Raman Spectroscopy

137

View full text Add to dashboard Cite

Raman spectroscopy has advanced considerably in the last several years due to rapid developments in instrumentation and the availability of theoretical methods for accurate calculation of Raman spectra, thus enormously facilitating the interpretation of Raman data. This review is restricted to cover papers mainly published in the Journal of Raman Spectroscopy, which serve to give a fast overview of recent advances in this research field as well as to provide readers of this journal a quick introduction to the various subfields of Raman spectroscopy. It also reflects the current research interests of the Raman community. Similar reviews of highly active areas of Raman spectroscopy will appear in future issues of this journal.

show abstract

“…The polystyrene latex bands (and their relative intensities) correlate very well with those observed for the reference standard. For polypyrrole, there is a wide range of literature available (e.g., Oddi et al 1986;Inoue et al 1987;Liu 2004;Chuang et al 2005); in Table 3 we refer to band assignments from Liu (2004), who, using a He-Ne laser as here, reported that Raman spectral features obtained using surface-enhanced Raman spectroscopy varied according to the electrical conductivity of the polypyrrole. Again, there is generally good agreement between our spectra and these literature spectra.…”

Section: Resultsmentioning

confidence: 99%

Extent of thermal ablation suffered by model organic microparticles during aerogel capture at hypervelocities

Burchell

Foster

Ormond-Prout

et al. 2009

Meteorit & Planetary Scien

View full text Add to dashboard Cite

Abstract-New model organic microparticles are used to assess the thermal ablation that occurs during aerogel capture at speeds from 1 to 6 km s −1 . Commercial polystyrene particles (20 µm diameter) were coated with an ultrathin 20 nm overlayer of an organic conducting polymer, polypyrrole. This overlayer comprises only 0.8% by mass of the projectile but has a very strong Raman signature, hence its survival or destruction is a sensitive measure of the extent of chemical degradation suffered. After aerogel capture, microparticles were located via optical microscopy and their composition was analyzed in situ using Raman microscopy. The ultrathin polypyrrole overlayer survived essentially intact for impacts at ~1 km s −1 , but significant surface carbonization was found at 2 km s −1 , and major particle mass loss at ≥3 km s −1 . Particles impacting at ~6.1 km s −1 (the speed at which cometary dust was collected in the NASA Stardust mission) were reduced to approximately half their original diameter during aerogel capture (i.e., a mass loss of 84%). Thus significant thermal ablation occurs at speeds above a few km s −1 . This suggests that during the Stardust mission the thermal history of the terminal dust grains during capture in aerogel may be sufficient to cause significant processing or loss of organic materials. Further, while Raman D and G bands of carbon can be obtained from captured grains, they may well reflect the thermal processing during capture rather than the pre-impact particle's thermal history.

show abstract

Improved surface‐enhanced Raman scattering of polypyrrole electrodeposited on roughened substrates composed of Au–Ag bimetallic nanoparticles

Cited by 16 publications

References 33 publications

Electroconductive and catalytic performance of polypyrrole/montmorillonite/silver composites synthesized through in situ oxidative polymerization

Electroconductive and catalytic performance of polypyrrole/montmorillonite/silver composites synthesized through in situ oxidative polymerization

Recent Advances in linear and nonlinear Raman spectroscopy I

Extent of thermal ablation suffered by model organic microparticles during aerogel capture at hypervelocities

Contact Info

Product

Resources

About